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Questions tagged [motor]

An electrical actuator that converts electrical energy into rotational motion or sustained linear motion (linear motor). There are many types of electric motors. If the specific type of motor is known, it is helpful to use or add a more specific tag, such as dc-motor, brushless-dc motor or induction-motor.

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34 views

How to calculate how much wight a motor can lift? [duplicate]

I know it might be a naive question but am not really an electrical or a mechanical engineer, but am in a situation here and I need some help. I work in motorized rolling doors and I need to know how ...
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1answer
25 views

Particle Argon controlling 12V, using 3.7V LiPo

I am trying to control a 12V DC motor using a Particle Argon, powered by a 3.7V LiPo. To get 12V I am using this step up regulator, and to control the motor I am using this DC motor controller. I am ...
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1answer
37 views

Monitoring Health of VFD [on hold]

Good day, Is there any method or external measuring tool that can be used to monitor the health status of a VFDs perdiodically?
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2answers
82 views

Three phase AC machine

I have encountered a three phase ac machine whose name plate contains following information: Y/360 V/90 Hz/2,3 A. I don't know whether it is an induction machine or permanent magnet synchronous ...
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1answer
20 views

different modes for analyzing the acceleration in an AC motor [on hold]

I searched a lot on the internet but I still can't understand what the different modes are for analyzing the acceleration and which one is better. I need the data from an accelerometer for condition ...
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1answer
28 views

How to Design with an AC Motor for a Specific Acceleration Objective

How do I determine the power necessary to accelerate a pump to meet a specific change in demand? The design is a VFD driving a constant torque positive displacement pump with a varying capacity load. ...
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3answers
63 views

How to connect this 3 wire AC motor?

I have this NEW heat recovery unit from Amazon (shady quality, branded as made in UK but actually made in China) with this motor inside. It was supposed to have two speeds (Low/Hi). Question: How ...
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2answers
81 views

Unable to activate an Nmosfet gate with raspberry pi

So I've been trying to control a motor using a MOSFET transistor, where the gate is controlled by a raspberry pi. My circuit is wired as follow: The diodes represent the raspberry pi ground and gpio ...
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0answers
32 views

Is it possible to electronically control the physical speed switch on air movers?

I have a few consumer level air movers (Xpower) that have a 3 speed physical switch. Is there a way I could replace the physical switch with something that would interface with a microcontroller to ...
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0answers
33 views

Motor mechanical brake troubleshooting

so we have this brake here : It was powered this way in the first place : (Frein means brake in french) But it won't open.. We've tried with a lab power supply, with 24v going at 0.5 A, same thing ...
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0answers
30 views

NOOB trying to create an VR rumble vest [closed]

I bought a PSVR during the last Black Friday and it has become my main form of gaming, so many awesome experiences IMO To enhance the experience I created a vibrating chair with a couple Tactile ...
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0answers
32 views

What would be a good constant source of power for a motor? [on hold]

A couple of friends and i want to build an orrery. We are having trouble in figuring out what would be a good power source for our motor. We are planning to use one motor to run the central gear ...
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1answer
24 views

Basic calculations of AC motor

I have a task to find a number of poles and rated slip of induction motor if frequency is 50 HZ and full load speed is 2950 rpm. However synchronous speed is not given. Is it correct to put full load ...
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1answer
30 views

Question about motor and generator size [duplicate]

For a given power, which will be larger, a motor or a generator? Is there a certain relationship between motor/generator size and power?
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2answers
36 views

Poles of induction motor rotor

For a three phase squirrel cage induction motor (IM,) we can have 2 or 4 or 6 etc. pole pairs on its stator and when these stator windings are energized by 3 phase mains supply then we get a rotating ...
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2answers
28 views

Induction Motor Poles and Drive Configuration

If an IM is driven by a VVVF drive and the poles of the motor do not match with the drive configs.. eg., IM is 4 poles but the drive setting is 2 poles.. or the other way around.. then can it create a ...
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1answer
86 views

Driving MOSFET with 5V PWM for 12V fan speed control

I came up with this circuit to control a 12V 6A fan's speed, with a 5V PWM from another circuit. I'm not sure if it's going to work (I'm not very experienced nor knowledgeable in electronics) and I ...
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1answer
19 views

DQ Currents in the Induction Motor Model

While studying the Induction Motor modelling and also its Vector control using DQ currents decoupling method.. I am finding it hard to see which current is which on the model diagrams. Can anyone ...
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1answer
38 views

Torque-Speed Equation for Induction Motor

I am looking for the Torque-speed equation on an Induction Motor that is used to draw the curve.
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0answers
42 views

May I have a free copy of Australian Stander ---AS/NZS 4871.1:2010? [closed]

May I have a free copy of Australian Stander ---AS/NZS 4871.1:2010?
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1answer
96 views

Novice question about high and low speed motors

Why some low speed electrical drives employ a high-speed motor and some form of mechanical speed reduction rather than direct drive motor. Is it because of size?
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0answers
21 views

IT characteristic implementation of motor protection circuit

I am trying to implement The IT - characteristic feature for motor protection device.There are 2C,5C,10C curve feature . can someone suggest me how it can be implemented in C code. Is there any ...
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2answers
42 views

My transistor used in a transistor amplifier does not get turned off with PWM based input

I am working on a project; driving a DC MOTOR using an NMOS MOSFET amplifier and Arduino PWM signal. My problem is my transistor amplfiler is always on when I vary the PWM input value from 0 to 255. ...
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1answer
52 views

Wiring a 2 pole three-phase DB motor to a VFD

Hello everyone this is my first time posting here so forgive me if my post seems a little choppy. So my dilemma is trying to hook up a 2 pole three-phase DB motor rated at 230 X 3. I did a fair amount ...
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2answers
34 views

Run actuator at higher voltage and with lower dutycycles

I have an actuator which is rated at 12 VDC input voltage (0-15) with a maximum allowed duty cycle of 20%. The already existing voltage levels in my system are 5V and 22V, and since I am weight ...
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1answer
30 views

Motor Voltage For Trike [closed]

I am fairly new to electrical engineering, and I am planning to build an electric reverse trike. I am planning to buy a 3kw hub motor from uumotor.com (Model number UMB3K). It states that it can on 48 ...
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0answers
29 views

Calculating max weight capacity of brushless motor [migrated]

I am having trouble determining the maximum weight capacity a motor can handle. I provided the specs below. The calculations are for the top row or the 580KV model. So to start off,I'm only taking ...
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1answer
31 views

motor slip vs rotational speed

In Induction motor theory the term slip is used as normalized relative speed of the rotor to the synchronous speed and it depends on the physical rotational speed of the rotor. Is there any special ...
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1answer
43 views

Connecting a 12V LED strip to a 7.4 2s Li-po battery in addition to two motors

I know this is going to be a completely stupid question, but since I'm working with a Li-Po I want to make sure I get this right. What I am building is a modified Nerf blaster that has two motors ...
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1answer
41 views

How to find the optimal speed of a BLDC motor having hall sensors? Can we change the most efficient speed through the controller? [closed]

How do we find the speed of BLDC motor at which it has minimum electrical losses so that we design a gearing system accordingly. And can we change the most efficient speed of a BLDC motor to suit our ...
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0answers
11 views

derive Equation between time and current in motor protection device

I am trying to imperilment The IT - characteristic feature for motor protection device.There are 2C,5C,10C curve feature . can someone suggest me how it can be implemented in C code. Is there any ...
0
votes
2answers
73 views

What would happen if a rotatable ferromagnetic rod were placed beside a magnet?

If one were to place a rotatable shaft (green circle), made of plastic with ferromagnetic material (grey circles inside green circle), right beside an electromagnet, what would happen? I am trying to ...
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1answer
55 views

Difference between Field Oriented Control and Direct Torque Control

What is the fundamental difference between Field Oriented Control (FOC) and Direct Torque Control (DTC) (say for an induction motor)? Is it really the same as described in https://www.researchgate.net/...
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3answers
61 views

AC motors power limitation

power of ac induction motor is limited by which term?? a) A resistance of copper winding b) frequency of supply voltage c) magnetic saturation of iron or d) air gap between motor & stator
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1answer
48 views

Confusion with braking-effect of a motor

To have overview I read the information at this link where braking is explained. Now I deal with a motor where it is recommended with a large uF capacitor under the regeneration section. The ...
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0answers
34 views

Difference between Hobby, commercial and MIL grade motor?

How do we differentiate between hobby, commercial and MIL grade motors? Are there any standards or regulations needed to be followed during design and development?
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0answers
13 views

Inverse LUT of flux-linkage maps for PMSM

I've been given the LUT of the flux linkages for an IPMSM in the dq-domain. \$\lambda_d = f_1(i_q, i_d)\\ \lambda_q = f_2(i_q, i_d)\$ The maps are obviously non-linear. The sampling has been done ...
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2answers
36 views

Replacing an old 2 speed rotary cam switch with VFD

I bought an old drill press tnw super condor 30l but the motor smoked because of the rotary cam switch is broken. The drill is old and the motor have no motor plate but few engraved numbers 380 and 20 ...
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1answer
100 views

Name of fabric insulator found inside motors

What is the name of the fabric sleeve insulator used for components (typically fuses) and solder joints found inside motor windings? Can regular heat shrink tubing be used as a substitute? Image by ...
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0answers
13 views

Dividing the rotor circuit by slip in induction motor

In this article equation (3), just after figure 5, they divided everything in the equation for current by slip. I understand that current remains the same when doing this, but voltage and power would ...
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1answer
43 views

Difference between Servo Motor, Stepper Motor and Switched Reluctance Motor

I posed a rather cluttered question earlier, by including the servo motor, which is, as pointed out by several of you, is not a specific kind of motor, but a closed loop control system involving servo ...
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1answer
41 views

Controlling speed of 7 DC motors from Arduino 101 using PWM outside of the audible range

I am researching a way to generate PWM for 7 independent DC motor drivers, each connected to a 12 V DC motor. The drivers take in a PWM signal, a direction signal and a 12 V DC supply and use this to ...
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1answer
37 views

Power consumption for an in-wheel motor

I'm trying to estimate the power consumption of an in-wheel electric motor. I used the formula $$P = T\cdot\omega + K_m\cdot T^2$$ where T is the torque, ω is the motor angular velocity and \$...
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1answer
31 views

Problems with Stepper Motor & SN754410

I am using a stepper motor for a project, it is the first time I've used one. The internet said it was very simple and easy but that's not true for me. I bought this motor from digikey https://www....
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0answers
36 views

Brushed DC Motor Speed Control

I designed different speed controllers for PMSM and BLDC motors yet, but I never tried to control the velocity of a brushed DC motor. So I gave it a try and didnt expect any difficulties, but it is ...
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0answers
29 views

Can I operate my (typical) 8mm Bipolar stepper like a BLDC?

My project involves use of these tiny steppers in an open loop- I'm not yet certain whether I can get away with the torque compromise that microstepping would require but it would be desirable. ...
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1answer
31 views

Dusk dawn motor driver with polarity reversal

I'm trying to accomplish this. When a dusk dawn switch is on, drive a small DC motor for a few seconds and then stop. when the dusk dawn switch is turned back off, then turn a small DC motor THE ...
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2answers
64 views

What will happen if we use an Inductor in place of a Capacitor in Single phase Induction motor

So as the titles says, well i know that a capacitor give phase shift and that results in a rotating Magnetic Field. So i was wondering what will happen if we use a an inductor, i mean doesn't it ...
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0answers
48 views

Circuit wont work with dc motor

This circuit wont work with the DC motor included but works fine with out it, what can I do to make it work? I need the motor to work when it receives the infrared signal, thanks.
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0answers
47 views

Ac motor questions

I have an 230 vac 5 hp motor with two start capacitors and two run capacitors. I got this motor and it was not connect so I couldn’t take pics as it was already disconnected.This motor is on an air ...